operation and maintenance manual zbtscth series power panel 100 - 4000...

OPERATION AND MAINTENANCE MANUALZBTSCTH SERIES POWER PANEL100 - 4000 AMPS

46R-7000DRev 8/97

INTRODUCTION

Zenith Bypass-Isolation Closed Transition Transfer Switches provideZenith’s most comprehensive load power protection during standardoperation, maintenance and testing procedures.

Closed Transition Transfer Switches parallel two available sources ofpower during test procedures to enable transfer without interrupting powerto the load (make-before-break). Paralleling of the two sources occurswithin a predefined window of synchronization and the initial source is thendisconnected. If the primary source falls below preset voltage limits and thesecond source is available, the transfer switch defaults to open transition(break-before-make) mode. In this mode, the transfer switch uses thepower from the available source to open the switch from the “dead source”first, before closing the switch into the second source. When in the Bypass-Isolation mode, the switch acts as a manual transfer switch, enablingtesting, repair and even removal of the automatic transfer switch.

All Zenith transfer switches are designed for use on emergency orstandby systems, and are rated for total system or motor loads.Transfer switches are UL Listed under Standard 1008 and CSACertified under Standard C22.2 No. 178.

This manual provides information on the installation, operation, andmaintenance of the switch. In addition, a complete information package issupplied with each transfer switch which details the features andaccessories provided on that switch. The information package and theinstruction manual should be kept in a readily accessible location toprovide complete reference information on this critically important piece ofequipment.

Section I INSTALLATION1. Requirements2. Equipment Inspection and Storage3. Mounting4. Power Connections5. Control Connections6. Final Equipment Inspection7. Functional Test

Section II OPERATION AND FEATURES1. Sequence Of Operation2. Bypass-Isolation Switch Operation3. Zenith Standard Package4. Zenith Optional Accessories

Section III MAINTENANCE AND TESTING1. Inspection and Cleaning2. Servicing3. Testing4. Troubleshooting5. Emergency Service Procedure/Extended Parallel Time

Section IV ADJUSTMENTS AND SETTINGS1. Paralleling Relay Settings2. Solid State Timers3. Voltage/Frequency Sensor (VFSM)4. Solid State Phase Relay (ARSM)5. Paralleling Window Under-Overvoltage Sensing Relay6. Electronic Time Switch Z2000-2A

Appendix A TYPICAL SCHEMATIC DIAGRAMS1. 100-400 Amps2. 600-3000 Amps3. Alarm Circuit Schematic4. Three-Phase Control Sensing Schematic5. Bypass Control Circuit

Appendix B REPLACEMENT PARTS1. Power Panel — 100-400 Amps2. Power Panel — 600-1200 Amps3. Power Panel — 1600-3000 Amps4. Bypass Subpanel5. Control Panel Layout and Parts List6. Cabinet Door Pilot Devices

TABLE OF CONTENTS

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ZBTSCTH Operation and Maintenance Manual (46R-7000)2 Zenith Controls, Inc.

SECTION I - INSTALLATION

DANGERHAZARDOUS VOLTAGE

(Can Cause Severe Injury or Death)

Turn OFF all power before installation, adjustment, or removal of transfer switch

or any of its components.

!

DANGER!Closed transition transfer switches typicallyrequire momentary paralleling of utility andgenerator sources. The customer shouldobtain approval from their utility before usinga closed transition transfer switch.

Before installation, it is necessary to store thetransfer switch in a clean dry place, protectedfrom dirt and water. Provide ample air circulationand heat, if necessary, to prevent condensation.

Storage Temperature:-30 C to + 65 C (-22 F to +149 F)

Operating Temperature (Ambient):-20 C to +75 C (-4 F to +167 F) [40-260 Amps]-20 C to +40 C (-4 F to +104 F) [400-3000 Amps]

Humidity:5% to 95% (non-condensing)

3. MOUNTING

Adequate lifting means must be used to mountthe transfer switch into place. The recommendedmethod for moving the transfer switch using thelifting eyes and a spreader bar is illustrated inFigure 1. Enough room should be allowed toopen the cabinet doors fully for inspection andservicing of the switch per NEC and local codes.

Before drilling conduit entry holes or anyaccessory mounting holes, cover and protect theswitch and control panel to prevent dirt and metalfragments from entering the mechanical andelectrical components. Failure to do so mayresult in damage and malfunction of the switch.

The following requirements must be met to use aclosed transition transfer switch:

a. Isochronous governor with a frequencyrange of 60 ± 0.2 Hz.

b. Shunt trip breaker on the genset witha response time not exceeding 50 milliseconds.

2. EQUIPMENT INSPECTION AND STORAGE

Immediately inspect the transfer switch whenreceived to detect any damage which may haveoccurred during transit. If damage is found orsuspected, file claims as soon as possible withthe carrier and notify the nearest Zenithrepresentative.

Each Zenith transfer switch is factory wired andtested. A complete information package isfurnished with each switch which includes:

a. Sequence of operation.b. Description and operation of all

accessories supplied.c. Power panel connection diagram and

schematic.d. Description and identification of all

customer field connections.

Installation of Zenith transfer switches includes:

a. Mounting the transfer switch cabinet.b. Connection of all Normal, Emergency,

and Load cables or bus bars.c. Connection of external control circuits

as required.

1. REQUIREMENTS

DCABINET

LIFTING EYES

SPREADER BAR

H45°

Figure 1

NOTICEWhen lifting the switch using a spreader bar,height H must be equal to half of distance D.

!

ZBTSCTH Operation and Maintenance Manual (46R-7000)Zenith Controls, Inc. 3

SECTION I - INSTALLATION (Continued)

4. POWER CONNECTIONS

Zenith transfer switches are supplied with ULlisted solderless screw type terminals asstandard for the Normal, Emergency, and Loadpower connections. Table 1 lists the number andsizes of the cable lugs supplied as standard foreach switch amp rating.

Connect the Normal, Emergency, and Loadconductors to the clearly marked terminals onthe transfer switch. Remove surface oxides fromcables by cleaning with a wire brush. Verify that

Tightening Torque for LugsSocket Size Torque

Across Flats Lb.-In. Lb.-Ft.

1/8 45 4

5/32 100 8

3/16 120 10

7/32 150 12

1/4 200 17

5/16 275 23

3/8 375 31

1/2 500 42

9/16 600 50

Tightening Torque for Bus BarsBolt Size Torque Bolt (Grade 5)

Lb.-In. Lb.-Ft.

1/4-20 72 6

5/16-18 132 11

3/8-16 300 25

1/2-13 720 60

Table 2

Table 3

Table 1

Screw Type Terminals for External Power Connections

Normal, Emergency & Load Terminals Fully Rated Neutral Bar (When Required)Switch Size(Amps) Cable Per Pole Range of Wire Sizes Number of Cables Number of Cables

100 1 #14 to 1/0 AWG 3 #14 to 1/0 AWG

150 1 #8 to 3/0 AWG 3 #6 AWG to 300 MCM

225 1 #6 AWG to 250 MCM 3 #6 AWG to 300 MCM




800

1000

1200

4 #2 AWG to 600 MCM 12 #2 AWG to 600 MCM

1600

2000

3000

4000

Line and load terminals are located inrear and arranged for bus barconnection.

12 3/0 AWG to 750 MCM

all connections are correct before tighteningthe lugs. All cable lug connections must betightened to the proper torque values as shownin Table 2.

Do not run cables or wiring behind front-connected transfer switches.

In cases where the Normal, Emergency, andLoad connections are made to a rear connectedbus bar, a compression washer, flat washer, anda minimum grade 5 bolt must be used andtorqued to the values in Table 3.



Table 4

Figure 2

Make all other necessary external controlconnections to the appropriate terminal blockslocated on the control panel. Insure that allconnections are tightened to the torquespecified in Table 4.

5. CONTROL CONNECTIONS

A complete information package is furnished witheach transfer switch including a completeconnection diagram and schematic which detailsall necessary control circuit field connections.

The engine start control wires connect to theterminals specified in the upper right corner ofthe bypass cabinet. Terminals for fieldconnections to the A3 Emergency auxiliarycontacts and the A4 Normal auxiliary contactsare also provided. These terminals are clearlymarked and appear on the left side of the ATSpower panel. Figure 2 below shows the locationof these terminals.

Control Wire ConnectionsWire Size (AWG) Torque Lb.-In.

18-16 19

14-8 19

6-4 36



Figure 3

6. FINAL EQUIPMENT INSPECTION

Prior to energizing the transfer switch:

a. Remove any debris incurred due toshipment or installation. DO NOT use ablower since debris may become lodged inthe electrical and mechanical componentsand cause damage. Use of a vacuum isrecommended.

b. Verify that all cabled connections arecorrect and that phase rotation of bothsources match.

c. Check engine start connections and verifythe correct connection of all control wires.

d. Check settings of all timers and adjust asnecessary. Also adjust any optionalaccessories as required. [See MX200manual (50R-2000) for instructions ontimer and option adjustments.]

e. Check the integrity of power connectionsby verifying actual lug torque values asspecified in this manual.

f. Make sure that all covers and barriers areinstalled and properly fastened.

7. FUNCTIONAL TEST

The functional testing of the transfer switchconsists of electrical tests described in thissection. Before proceeding, refer to theinformation package supplied with the transferswitch. Read and understand all instructions andreview the operation of all accessories provided.

Before starting the operation test, check theequipment rating nameplate on the transferswitch to verify the correct system voltage. Anexample of the equipment rating nameplate isshown in Figure 3.

To begin the test, close the Normal source circuitbreaker. Phase relays B1, B2, and B3 will pickup and the LED indicators will illuminate. Verifythe phase to phase voltages at the Normal lineterminals.

Next, close the Emergency source breaker andstart the engine generator. The VFSM relay will

pick up and the LED indicator will illuminate.Check the phase to phase voltages at theEmergency line terminals. Also, verify that thephase rotation of the Emergency source is thesame as the phase rotation of the Normalsource.

After the sources have been verified, shut downthe engine generator, and put the starting controlin the automatic position. Complete the visualinspection of the transfer switch, and close andlock the cabinet door.

Initiate the electrical transfer test by activatingthe test switch (TS). This de-energizes theengine start relay. The transfer switch closes intoEmergency only after the sync-check relayensures the proper phase relationship of bothsources. After the transfer switch closes intoEmergency, the SE limit switch becomesactivated to de-energize the CCE relay andenergize the CCNO relay. This opens thetransfer switch out of Normal. When the transferswitch has opened out of Normal, the SNO-2limit switch activates to de-energize the CCNOrelay. The transfer switch has now closed intoEmergency power without interrupting the load.

Turning the TS to AUTO initiates re-transfer toNormal. The transfer switch closes into Normalonly after the sync-check relay ensures theproper phase relationship of both sources. Afterthe transfer switch closes into Normal, the SNlimit switch becomes activated (de-activated in400 Amp units) to de-energize the CCN relay andenergize the CCEO relay; the transfer switchopens out of Emergency. Then the SEO-2 limitswitch activates to de-energize the CCEO relay.The transfer switch has now closed back intoNormal power without interrupting the load.

The transfer switch defaults to an open transitiontransfer when the Normal source fails. Closedtransition transfer is not possible with one sourceavailable. Open transition transfer for testing canbe selected via the transition mode selectorswitch. (For a description of the Open Transitionsequence of operation, refer to Section II -Operation and Features, page 6.)

A 24 VDC circuit is supplied to control the alarmand warning indicators. To ensure continuouspower to this circuit, a constant 24 VDC can besupplied by the customer from the engine startbattery.

NOTICE !A periodic test of the transfer switch underload conditions is recommended to insureproper operation.


SECTION II - OPERATION AND FEATURES1. SEQUENCE OF OPERATION

Figure 4 is a typical schematic diagram of aZenith closed transition transfer switch. Theinformation supplied with the transfer switchincludes a schematic diagram and description ofoperation of all accessories provided.

Transfer of the load to the Emergency sourcebegins automatically when any phase of theNormal source falls below the preset dropoutpoint and this undervoltage failure condition isdetected by solid state phase relays B1, B2, B3.

The phase relays drop out, de-energizing theNormal control relays CR & CR2, and enginestart timer P1 begins its timing cycle. The P1 timedelay is provided to override momentary outagesand to prevent nuisance starting of the enginegenerator. If the Normal source voltage returnsabove the phase relays’ pickup setting, the P1timing cycle is reset to zero by re-energizing theCR relay.

If the normal source voltage does not returnbefore the P1 time delay is completed, the P1timer drops out and sends a starting signal to theengine generator. An Emergency voltage andfrequency sensing relay (VFSM) monitors thevoltage and frequency of the Emergency source.When both the voltage and the frequency of theEmergency source reach the preset pickuppoints, the VFSM relay initiates transfer to theEmergency source and timer W begins it timingcycle. The W timer provides an adjustabletransfer delay to the Emergency source asrequired.

When the W time is completed, the Emergencycontrol relay RT energizes and picks up theCCNO relay. The CNO solenoid is thenenergized to open the transfer switch fromnormal position to neutral position. The switchremains in the neutral position for the duration ofthe DW time delay. After the DW time delay iscompleted, the CCE relay energizes the CEsolenoid to close the transfer switch into theemergency source. The SE limit switch activatesto de-energize the CCE relay.

The sequence for retransfer to the Normalsource begins automatically when the voltage onall phases of the Normal source reach the presetpickup point and this condition is detected by thesolid state phase relays, B1, B2, B3.

When the Normal source restores and if thetransition mode selector switch is in CT (ClosedTransition), the transfer switch will return to theNormal source in a make-before-break sequence(this is described in the Testing section of thismanual).

If the transition mode selector switch is in OT(Open Transition), the transfer switch will returnto the normal source in a break-before-makesequence. When the Normal source restores, thesolid state phase relays, B1, B2, B3 pick up andswitching to the Normal source is initiated byenergizing timer T, beginning its timer cycle. TheT timer provides an adjustable delay to insurethat the Normal source has stabilized beforereconnection to the load. If the Normal sourcefails before the T time delay completes, thephase relays drop out and the T timing cycle isreset to zero.

When the T time delay is completed, the Normalcontrol relay CR energizes and picks up thepower relay CCEO. This energizes the CEOsolenoid opening the transfer switch out of theemergency source. The SEO-1 limit switchactivates to energize the DT time delay andde-energize the CCEO relay. After the DT timedelay is completed, the CCN relay energizes theCN solenoid to retransfer the switch into thenormal source. The SN limit switch activates tode-energize the CCN relay. The SN limit switchalso energizes the engine over-run timer U andbegins its timing cycle. This timer provides aperiod of time for the engine generator to runwithout load and cool down before shutdown.After the U time delay is completed, the P1 timeris energized and the engine generator is shutdown.

NOTES:1. The transition mode selector switch on the

front door enables the user to operate theunit in Open Transition mode, if so desired.

2. When in Closed Transition mode, if thetransfer switch does not open the first sourcewithin 100 milliseconds, an alarm will sound,the transfer switch will open the last source itclosed in to and will lock out the controlcircuit from any transfer operation. After thecondition has been corrected the controlcircuit should be reset by turning the Failedto Open Lockout Reset switch to the right.

3. The controls will provide a signal to shunt tripthe generator breaker if the transfer switchremains closed into both sources for morethan 325 ms. The load will then be fed by theutility source. The maximum time that thetwo sources would be parallel, under theseconditions, is less than 0.5 sec. Beforeoperating the closed transition transferswitch the condition must be corrected andthe shunt trip reset. Refer to the procedurefor servicing the switch after shunt trippingoccurs. The shunt trip reset switch isprovided on the front door. Alarm and lightson the front door provide indication of failureconditions.


SECTION II - OPERATION AND FEATURES (Continued)

Figure 4



2. BYPASS-ISOLATION OPERATION - 100-400 AMP

a. Automatic1) Manually operated bypass switch contacts (BN/BE) are

open and ATS is supplying load.2) Disconnect Switch (DS) is in Auto.

b. To Bypass ATS1) Open bottom cabinet door and turn DS to Inhibit.2) Position Manual Bypass Handle (MBH) to same power

source as ATS.

c. To Test ATS1) Bypass per above instructions.2) Move ATS Location Handle (ALH) to Test location.3) Turn DS to Auto.4) Test Switch (TS) on bottom cabinet door will allow

electrical operation of ATS.

d. To Isolate ATS1) Bypass per above instructions.2) Move ALH to Isolate location.

e. To Remove ATS1) Bypass and isolate per above instructions.2) Move ALH to Release location.3) Disconnect multipin plugs.4) Lift ATS out of drawer.

f. To Reconnect ATS1) Place ATS into drawer slots (front rollers first).2) Turn DS to Inhibit.3) Manually position ATS into same source as bypass switch.4) Reconnect multipin plugs and external connections to ATS.5) Push ATS inward to engage carriage.6) Move ALH to Test location (as indicated by light).7) Turn DS to Auto and use TS to electrically operate ATS.8) Turn DS to Inhibit.9) Move ALH to Auto location.10) Turn DS to Auto and open bypass with MBH.11) ATS is now fully automatic.

Legend:

1. BP - bypass switch (indicated by contacts BN/BE) is a three position switch.

2. ATS - Automatic Transfer Switch.

Notes:

1. DS in Inhibit will prevent ATS electrical operation.

2. Do not use excessive force on mechanical handles.

3. Figures depict Bypass Normal. Sequence is the same for Bypass Emergency.

4. When ATS is in Test or Isolate, bypass switch is manual;transfer switch to either available source (indicated on light panel).

5. To operate bypass switch whenATS is in Test or Isolate, position MBH to available power source.






b. To Bypass ATS1) Open bottom cabinet door and turn DS to Inhibit.2) Turn Bypass Selector Switch (BSS) to same power source

as ATS.3) Move the Manual Bypass Handle (MBH) upward.

c. To Test ATS1) Bypass per above instructions.2) Rotate crank mechanism counterclockwise until ATS Test

light is illuminated.3) Turn DS to Auto.4) Test Switch (TS) on bottom cabinet door will allow electrical

operation of ATS.

d. To Isolate ATS1) Bypass per above instructions.2) Rotate crank mechanism counterclockwise until ATS

Isolated light is illuminated.

e. To Remove ATS1) Bypass and isolate per above instructions.2) Disconnect multipin plugs and external connections to ATS.3) Rotate four power panel latches to vertical position, slide

ATS forward and lock mechanism in place.4) ATS can now be removed from cabinet.

f. To Reconnect ATS1) Place ATS in slide mechanism.2) Unlock slide mechanism. Slide ATS over power panel

latches and rotate latches to horizontal position.3) Turn DS to Inhibit.4) Manually position ATS into same source as bypass switch.5) Reconnect multipin plugs and external connections to ATS.6) Rotate crank mechanism clockwise until ATS Test light is

illuminated.7) Turn DS to Auto and use TS to electrically operate ATS.8) Turn DS to Inhibit.9) Move ALH to Auto location.10) Turn DS to Auto and open bypass with MBH.11) ATS is now fully automatic.

Legend: 1. BP - Bypass Switch

(indicated by contacts BN/BE) is a three position switch.


Notes:1. DS in Inhibit will prevent ATS

electrical operation.2. Do not use excessive force on

mechanical handles.3. Figures depict Bypass Normal.

Sequence is the same for Bypass Emergency.

4. When ATS is in Test or Isolate, bypass switch is manual transferswitch to either available source (indicated on light panel).

5. To operate bypass switch when ATS is in Test or Isolate:a) Move MBH downward (to open

open Bypass Contacts BN/BE).b) Turn BSS to opposite power

source.c) Move MBH upward to close

into selected power source.






b. To Bypass ATS1) Open bottom cabinet door and turn DS to Inhibit.2) Turn Bypass Selector Switch (BSS) to same power source

as ATS.3) Move the Manual Bypass Handle (MBH) upward.

c. To Test ATS1) Bypass per above instructions.2) Rotate crank mechanism counterclockwise until ATS Test

light is illuminated.3) Turn DS to Auto.4) Test Switch (TS) on bottom cabinet door will allow electrical

operation of ATS.

d. To Isolate ATS1) Bypass per above instructions.2) Rotate crank mechanism counterclockwise until ATS

Isolated light is illuminated.

e. To Remove ATS 1) Bypass and isolate per above instructions.2) Disconnect multipin plugs and external connections to ATS.3) Slide four corner latches of ATS to innermost position.4) ATS can now be removed from cabinet.

f. To Reconnect ATS1) Roll cart back into cabinet.2) Slide four corner latches of ATS to outermost position.3) Turn DS to Inhibit.4) Manually position ATS into same source as bypass switch.5) Reconnect multipin plugs and external connections to ATS.6) Rotate crank mechanism clockwise until ATS Test light is

illuminated.7) Turn DS to Auto and use TS to electrically operate ATS.8) Turn DS to Inhibit.9) Rotate crank mechanism clockwise until ATS location

pointer is aligned with Auto mark on location indicator (ATS must be in same source as bypass).

10) Turn DS to Auto and open bypass with MBH.11) ATS is now fully automatic.

Legend: 1. BP - Bypass Switch

(indicated by contacts BN/BE) is a three position switch.


5. To operate bypass switch when ATS is in Test or Isolate:a) Move MBH downward (to

open Bypass Contacts BN/BE)

b) Turn BSS to opposite power source.

c) Move MBH upward to close into selected power source.

Notes:1. DS in Inhibit will prevent ATS

electrical operation.2. DO NOT use excessive force

on mechanical handles.3. Figures depict Bypass Normal.

Sequence is the same for Bypass Emergency.

4. When ATS is in Test or Isolate, bypass switch is a manual transfer switch to either availablesource (indicated on light panel).



5. ZENITH STANDARD PACKAGE

The Zenith Closed Transition Switch comes withthe following standard features:

A3 Auxiliary contact closes when the switch isin the Emergency position.

A4 Auxiliary contact closes when the switch isin the Normal position.

DT Adjustable time delay before closing intoNormal source from open position (OpenTransition Mode only).

DW Adjustable time delay before closing intoEmergency source from open position(Open Transition Mode only).

E Engine start contact closes to start theengine generator when the Normal sourcefails. 1 N.O., 1 N.C. contact.

P1 Solid state adjustable timer with range from0.5 to 6.0 seconds. The contact closes tostart the engine generator.

T Adjustable time delay to transfer out ofEmergency source and into open positionafter Normal source is restored.

U Adjustable time delay for engine cool downafter engine generator is signaled to shutdown.

W Adjustable time delay to transfer out ofNormal source and into open position afterNormal source failure.

6. ZENITH OPTIONALACCESSORIES

Many control accessories are available to meetspecific and special requirements. Yourdrawings indicate which accessories wereordered with your switch.


SECTION III - MAINTENANCE AND TESTINGA preventive maintenance program will insurehigh reliability and long life for the transfer switch.The preventive maintenance program for thetransfer switch should include the followingitems:

1. INSPECTION AND CLEANING

HAZARDOUS VOLTAGE (Can Cause Severe Injury or Death)

Turn OFF all power before installation,adjustment, or removal of transfer switch or

DANGER!

Before doing any work on the transfer switch,de-energize all sources of power. The switchshould be inspected for any accumulation ofdust, dirt, or moisture, and should be cleaned byvacuuming or wiping with a dry cloth or softbrush. DO NOT use a blower since debris maybecome lodged in the electrical and mechanicalcomponents and cause damage.

Remove the transfer switch barriers and checkthe condition of the contacts. Any surfacedeposits must be removed with a clean cloth (DONOT USE EMERY CLOTH OR A FILE). If thecontacts are pitted or worn excessively, theyshould be replaced. A general inspection ofmechanical integrity should be made to includeloose, broken or badly worn parts.

2. SERVICING

All worn or inoperative parts must be replacedusing Zenith recommended replacement parts.Appendix B at the back of this manual includesreplacement part information for typical powerand control panel configurations. When orderingparts provide the model number or serial numberfrom the transfer switch rating nameplate.

The operating mechanism of the transfer switchis lubricated with Lubriplate 105. The lubricantapplied at the factory provides adequatelubrication for the lifetime of the switch. Shoulddebris contaminate the mechanism, clean andapply additional Lubriplate.

3. TESTING

After completing the inspection, cleaning andservicing of the transfer switch, reinstall theswitch cover, and close and lock the cabinetdoor. Reclose the circuit breakers feeding theutility and generator sources to the switch.

Initiate the electrical transfer test by activatingthe TS test switch. This de-energizes the enginestart relay. The transfer switch closes intoEmergency only after the sync-check relayensures the proper phase relationship of bothsources. After the transfer switch closes intoEmergency, the SE limit switch becomesactivated to de-energize the CCE relay andenergize the CCNO relay. This opens thetransfer switch out of Normal. When the transferswitch has opened out of Normal, the SNO-2limit switch activates to de-energize the CCNOrelay. The transfer switch has now closed intoemergency power without interrupting the load.

Turning the TS to AUTO initiates re-transfer toNormal. The transfer switch closes into Normal,only after the sync-check relay ensures theproper phase relationship of both sources. Afterthe transfer switch closes into Normal, the SNlimit switch becomes activated to de-energize theCCN relay and energize the CCEO relay; thetransfer switch opens out of Emergency. Thenthe SEO-2 limit switch activates to de-energizethe CCEO relay. The transfer switch has nowclosed back into normal power withoutinterrupting the load.

The transfer switch defaults to an open transitiontransfer when the Normal source fails. Closedtransition transfer is not possible with one sourceavailable. Open transition transfer for testing canbe selected via the transition mode selectorswitch.

A 24 VDC circuit is supplied to control the alarmand warning indicators. To insure continuouspower to this circuit, a constant 24 VDC can besupplied by the customer from the engine startbattery.

NOTICE!A periodic test of the transfer switch underload conditions is recommended to insureproper operation.


SECTION III - MAINTENANCE AND TESTING (Continued)

4. TROUBLESHOOTING

Before beginning any troubleshooting activity, refer to the information package supplied with the transferswitch and review the description and operation of all accessories supplied. Also refer to Section II of thismanual, Operation and Features.

CONDITION ITEMS TO BE CHECKEDa. Engine-Generator Does Not Start

when Normal source fails or TestSwitch (TS) is activated.

1) Verify the setting of the time delay P1.2) Make sure timer P1 drops out and the engine-start

contact closes after time delay is completed.3) Make sure the starting battery is charged and

connected to the engine-generator.4) Generator controls in Automatic mode.5) Verify wiring of the engine-start contact If the generator

does not start, contact the generator dealer.b. Does Not Transfer To Emergency

after generator starts.1) If in Closed Transition Mode:

a) Verify that the phase angle difference betweenNormal and Emergency is < 5° (@ 0.1 Hz f).

b) Verify that the frequency difference betweenNormal and Emergency is < 0.2 Hz (0.1 Hz isrecommended). Also verify that the frequencydifference is not 0 Hz.

c) Verify that the voltage difference between Normaland Emergency is < ±5% of nominal.

d) Verify that the phase sequence is the same forNormal and Emergency.

2) Emergency source breaker should be closed.3) Emergency source voltage and frequency should meet

the preset pickup values of the VFSM relay.4) Make sure Emergency control relay RT picks up after

time delay W.c. Does Not Retransfer To Normal

when Normal source restores orTest Switch (TS) is deactivated.

1) If in Closed Transition Mode:a) Verify that the phase angle difference between

Normal and Emergency is < 5° (@ 0.1 Hz f).b) Verify that the frequency difference between

Normal and Emergency is < 0.2 Hz (0.1 Hz isrecommended). Also verify that the frequencydifference is not 0 Hz.

c) Verify that the voltage difference between Normaland Emergency is < ±5% of Nominal.

d) Verify that the phase sequence is the same forNormal and Emergency.

2) Normal source voltage should meet the preset pickupvalue of the phase relays.

3) Make sure Normal control relay CR picks up after timedelay T.

4) Verify the circuit connections from the power relay, CN1or CCN, to the Normal switch operating circuit.

5) Verify the circuit connections from the power relay, CE1or CCE, to the Emergency switch operating circuit.

d. Engine-Generator Does NotShutdown after retransfer toNormal.

1) Verify the setting of engine overrun time delay U.2) Make sure timer P1 picks up and the engine-start

contact has opened.3) Generator controls in Automatic mode.4) Verify wiring of the engine-start contact.



5. EMERGENCY SERVICE PROCEDURE FOR EXTENDED PARALLEL TIME

a. Auto Location:

Removal of closed transition transfer switchafter Emergency breaker shunt trip.

1) Disconnect all power sources from bypass-isolation transfer switch.

2) Open the bottom cabinet door and turn the Disconnect Switch (DS) to the OFF position.

3) Remove the service access cover on the left hand side of the transfer switch.

4) The manual operator and the manual handle will now be exposed. Insert the handle into the Emergency side manualoperator. Open the Emergency side contacts.

5) Close bottom cabinet door.6) Energize Normal power.7) Close the bypass contacts (BN) as

described in Section II of this manual.8) Isolate the transfer switch as described

in Section II.9) Remove the transfer switch from the

bypass-isolation transfer switch as indicated on the bypass instruction labelto inspect and repair.

10)Re-install the transfer switch after maintenance with contacts closed to thesame source as the bypass switch. Re-install the manual handle in its holder and the service access cover on the leftside of the transfer switch.

11) Re-connect the transfer switch to AUTO,as described in Section II.

b. Auto Location:

Removal of the closed transition transfer switch if Normal and Emergency contacts remain open.

1) Turn the BSS to an available source. Close the bypass switch into theavailable source as described in

Section II of this manual.2) Turn the DS to INHIBIT. Remove the

transfer switch service access cover. Close the transfer switch into the same source as the bypass switch. (Incorrectsequencing is prevented by the interlocks while the transfer switch is in AUTO only.)

3) Remove the transfer switch from thebypass-isolation transfer switch as indicated in Section II to inspect and repair.

c. Test Location:

Removal of the closed transition transfer switch if both Normal and Emergency contacts remain open.

1) Close the bypass switch contacts (BN) as indicated on the bypass instruction label on the cabinet door.

2) Disconnect all power sources frombypass-isolation closed transition transfer switch.

3) Open bottom cabinet door. Turn theDisconnect Switch (DS) to the OFF position.

4) Remove the service access cover on the left side of the transfer switch.

5) The manual operator and the manual handle will not be exposed. Insert the handle into the Normal side and close the Normal contacts.

6) Close the bottom cabinet door.7) Energize Normal power.8) Remove the automatic transfer switch

from the bypass-isolation transfer switchas indicated in Section II.

9) Re-install the transfer switch after maintenance with contacts closed to thesame source as the bypass switch. Re-install the manual handle in its holder and the service ccess cover on the left side of the transfer switch.

10)Re-connect the transfer switch to AUTO,as indicated in Section II.


FIELD NOTES

Model Number

Serial Number

Date Shipped

Start-Up Date

Drawings Supplied

Date


Test And Maintenance Notes

Tested Observations Notes


SECTION IV - ADJUSTMENTS AND SETTINGS (Continued)

1. PARALLELING RELAY SETTINGS

25, 27/59N & 27/59E are factory set to allowparalleling of the sources only when theseconditions have been met:

a. Phase Angle Differences < 5° (@ 0.1 Hz f)b. Frequency Difference < 0.2 Hzc. Voltage Difference < ±5% Nominal

NOTES:

1. This system requires an isochronous governor with an operating frequency of60 ± 0.2 Hz.

2. Requires a shunt trip breaker on generator setwith a response time not exceeding 50 ms.

2. SOLID STATE TIMERS

Solid state timers are adjustable from 0.1 secondto 100 hours. The red timing indicator in theupper left corner flashes as the timer progressesthrough the timing cycle. When the timing cycleis completed, the indicator remains illuminated. Aflathead screwdriver is required to change thesetting, as shown in Figure 5 below.

CAUTION!Do NOT change the setting while the timer isenergized. Timer malfunction or damage may

The time unit is selected by turning the rotaryswitch at the lower right of the timer. Fourselections are available: “Seconds”, “Minutes”,“Hours”, “10 Hours”. The time unit selected isdisplayed in the window below the time settingdial.

The time range is selected by turning the rotaryswitch at the lower left of the timer. Four rangesare available: “0-0.5”, “0-1.0”, “0-5.0”, “0-10.0”.The dial digits appear in the windows around thetime setting knob.

Figure 5

The factory setting of the solid state timers usedin the Zenith standard package are shown inTable 5 below.

Timer Factory Setting

TUWDTDWST

PARTOLCETT

30 minutes5 minutes1 second5 seconds5 seconds1 second

0.002 sec,0.275 sec.0.420 sec.

3. VOLTAGE/FREQUENCY SENSOR (VFSM)

The pickup point may be adjusted by rotating theadjustment screw as shown in Figure 6 below.Counter-clockwise rotation increases the pickupvoltage.

Table 5

Pickup Voltage (at 100% Frequency)Adjustable: 80% to 95%Factory Set: 90%Pickup FrequencyAdjustable: 80% to 100%Factory Set: 95%

Figure 6


4. SOLID STATE PHASE RELAY (ARSM)

The pickup and dropout points may be adjustedby using the following procedure. Use of avariable voltage supply (Variac) is required. Therelay is illustrated in Figure 7 below.


a. Turn the pickup adjustment fully clockwise.b. Turn the dropout adjustment fully counter-

clockwise.c. Set Variac to the desired pickup voltage.d. Rotate the pickup adjustment counterclock-

wise very slowly until the relay picks up. TheLED will illuminate.

e. Set Variac to the desired dropout voltage. f. Rotate the dropout adjustment clockwise very

slowly until the relay drops out. The LED willgo out.

g. Verify the setting by raising the voltage untilthe relay picks up and lowering the voltageuntil the relay drops out.

Pickup Voltage: 75% to 115% of Nominal Factory Set: 90% of NominalDropout Voltage: 55% to 105% of NominalFactory Set: 80% of Nominal

5. PARALLELING WINDOW UNDER-OVERVOLTAGE SENSING RELAY

The pickup and dropout points may be adjustedby using the following procedure. Use of avariable voltage supply (Variac) is required. Therelay is illustrated in Figure 8.

a. Turn both DIFF adjustments fully counter-clockwise.

b. Undervoltage sensing - Use lowest phase tophase relationship on Variac to set the relay.Set Variac voltage to desired undervoltagesetting. Turn undervoltage SET adjustmentfully clockwise, then slowly counterclockwiseuntil the LED illuminates.

c. Overvoltage sensing - Use the highest phase to phase voltage relationship on Variac to set

the relay. Set Variac voltage to desiredovervoltage. Turn overvoltage SET adjustmentfully clockwise, then counterclockwise untilLED illuminates.

Undervoltage: 75-100% of 120VFactory Set: 95%Overvoltage: 100-125% of 120VFactory Set: 105%

6.ELECTRONIC TIME SWITCH Z2000-2A

This time switch is used for the C/D option. Timeswitch Z2000-1A is used for the C option.

a. Setting Time and Day:

Press and hold “ ” button during the Followingadjustments:

1) Press “d” to set day pointer to correct day:1 = Monday...7 = Sunday

2) Press “h” to set the hour. The time of day isexpressed in 24-hour military time:04:00 = 4 a.m.....20:00 = 8 p.m.

3) Press “m” to set minutes4) Release “ ” button. Clock is running

Figure 7

Figure 8



b. Programming:

Twenty-four total ON or OFF settings areavailable on one, several, or all days of the week.

1) Press Prog button. The blank program entryfield will appear with two flashingpoints: “__:__”

2) Press either C1 or C2 depending on whichchannel you wish to program.

3) Next, select either On or Off by pressingC1 or C2 which toggles the On/Off mode.

4) You will now see the pointer flashing above1 for Monday. To lock in Monday, press Prog.If you want to enter further days, press d thenProg to lock them in. Solid pointers must bedisplayed over each day that the switchingcommand is required.

5) Once the days are selected, press h buttonto enter the desired hour and press m toenter the desired minutes. To enter theprogram into the time switch, press Prog.When the programming is complete, press“ ” to return the clock run mode. If the “ ”button is not depressed, it will switch to theclock run mode after 60 seconds.

c. Program Review and Change:

Press Prog button to recall and review the C1and“C2 On/Off times. An E is displayed if all 24positions are used or if the next available positionis not filled. To change or clear a program, pressProg button to find the program to be changed orcleared. Change by pressing d, h or m buttons asrequired. Clear the entire program bysimultaneously pressing “h” and “m”. Press “ ”to return to the clock run mode.

d. Program Override:

Each On/Off state can be manually changed bypressing C1 or C2. The next counteractingprogram cancels the manual override andresumes previous programming.

To continuously override automatic programming,press m and C1 or C2. The continuous overrideOn/Off stat is preceded by a black dot on thedisplay. To cancel, press m and C1 or C2 until thedot disappears.

The automatic program can be continuouslyoverridden up to 47 days by pressing andholding h while pressing C1 or C2 until thedisplay shows the number of days desired.Starting the following day at “0:00”, the displaywill show a “0:00”, both C1 and C2 off, and an Hin the lower right hand corner.

Figure 9


APPENDIX A - TYPICAL SCHEMATIC DIAGRAMS

1. 100-400 AMPS


APPENDIX A - TYPICAL SCHEMATIC DIAGRAMS (Continued)

2. 600-3000 AMPS


3. ALARM CIRCUIT SCHEMATIC


4. 3φ CONTROL SENSING SCHEMATIC


5. BYPASS CONTROL CIRCUIT

a. 100-400 Amp


b. 600-3000 Amp


APPENDIX B - REPLACEMENT PARTS

NOTICE !Model number and serial number of switch must be included with all orders for replacement parts.Specify line voltages, drawing numbers and date of installation. When ordering parts not shown onthe parts list, refer to this part by its legend description in the wiring diagrams.

1. POWER PANEL 100-400 AMPS



APPENDIX B - REPLACEMENT PARTS (Continued)


5. BYPASS SUBPANEL4. POWER PANEL 4000 AMPS



Power Panel Replacement Parts List 100-400 AmpsTag Description 100A 150A 225A 260A 400A

NL1,2,3EL1,2,3 Cable Connection Lug, PS-4418 PS-4418 PS-4418 S-1422 S-1422T1,2,3 CU WireNLN, ELN, TN

Bypass Contact Assembly (Movable and Stationary)N1,2,3 Normal 46P-1104A 46P-1104B 46P-1104C 46P-1104D 46P-1104E

N (Sw. Neutral Normal) 46P-1105A 46P-1105B 46P-1105C 46P-1105D 46P-1105E

E1,2,3 Emergency 46P-1106A 46P-1106B 46P-1106C 46P-1106D 46P-1106E

E (Sw. Neutral Emergency) 46P-1107A 46P-1107B 46P-1107C 46P-1107D 46P-1107E

ATS Contact Assembly (Movable and Stationary)NL1,2,3 Normal 46P-1100A 46P-1100B 46P-1100C 46P-1100D 46P-1100E

N (Sw. Neutral Normal) 46P-1101A 46P-1101B 46P-1101C 46P-1101D 46P-1101E

EL1,2,3 Emergency 46P-1102A 46P-1102B 46P-1102C 46P-1102D 46P-1102E

N (Sw. Neutral Emergency) 46P-1103A 46P-1103B 46P-1103C 46P-1103D 46P-1103E

Arc Grid Assy. 46P-1099

Voltage Part No.

120/240 K-3061

Bypass Step-Down 208/416 K-3063

XBN, XBE Transformer 220/440 K-3064

Secondary 24V 240/480 K-3062

380 K-3067

575 K-3065

600 K-3066

Main ATS Operating CoilsNo. Volts Ph Wire Coil Volts Poles Part No.

-1 120 1 2 120 2 K-2178

-2 120/240 1 3 240 2, 3

-3 240 3 3 240 3 K-2189

-38 120/240 3 4 240 3, 4

CN/O & CE/O -4 120/208 3 4 208 3, 4 K-2177

-5 480 3 3 480 3 K-2176

-6 575/600 3 3 575/600 3 SPO-7 277/480 3 4 480 3, 4 K-2176

-9 240/416 3 4 416 3, 4 SPO

-91 220/380 3 4 380 3, 4 K-2188

SN/SEOSE/SEOA3A4

Normal Position Limit SwitchEmergency Position Limit SwitchATS Emergency Position SwitchATS Normal Position Switch

L-3002

SCN/O & SCE/O CN/O & CE/O Limit Switches L-3079

AAAE1,2PLS1,2

ATS Auto Location SwitchATS Isolate/Remove Location SwitchPosition Lever Switch

L-3071

AIAT1,2

ATS Isolate Location SwitchATS Test Location Switch

L-3070

AB3/ABEAB4/ABNNA4EA3

Bypass Emergency Position SwitchBypass Normal Position SwitchNormal TRS Limit SwitchEmergency TRS Limit Switch

L-5021

BTEBTNTSEBLLALL

Bypass Emergency Position SwitchBypass Normal Position SwitchATS Engaged SwitchBypass Lock Location SwitchATS Lock Location Switch

L-3054

DS ATS Solenoid Disconnect Switch:Operator 2-Position Maintain L-4018

Contact Block N.C. (3) L-1029

Contact Block N.O. (2) L-1028

Contact Block Mounting Plate PS-3473

BPSTRS

Bypass Interlock SolenoidTransfer Release Solenoid

K-2180



Power Panel Replacement Parts List 600-1200 AmpsTag Description 600A 800A 1000A 1200A

N 1,2,3,N Normal Connections CU/AL Cable Lugs S-2119

(2) 600MCM-2

S-2131

(3) 600MCM-2

S-2132

(4) 600MCM-2

S-2132

(4) 600MCM-2

E 1,2,3,N Emergency Connections CU/AL Cable Lugs S-1393F

(2) 600MCM-2

S-1391F

(3) 600MCM-2

S-1392F

(4) 600MCM-2

S-1392F

(4) 600MCM-2

T 1,2,3,N Load Connections CU/AL Cable Lugs S-1393F

(2) 600MCM-2

S-1391F

(3) 600MCM-2

S-1392F

(4) 600MCM-2

S-1392F

(4) 600MCM-2

STAT (BP) Stationary Contact Assembly Bypass 26P-1144 26P-1126 26P-1126 26P-1126

STAT (ATS) Stationary Contact Assembly ATS 26P-1144 26P-1126 26P-1126 26P-1126

ARC Arc Grid Assembly Kit 23P-1366

MOV Movable Contact Assembly 23P-1157 23P-1125 26P-1125 26P-1125

Movable Contact (Switched Neutral) 23P-1157 26P-1231 26P-1231 26P-1231

Voltage Part No.

120/240 K-3061


XBN, XBE Transformer 25VA, 220/440 K-3064

Secondary 24V 240/480 K-3062

380 K-3067

575 K-3065

600 K-3066

Main ATS Operating CoilsVoltage Systems

No. Volts Ph Wire Coil Volts Poles Part No.

-1 120 1 2 120 2 SPO

-2 120/240

1 3 240 2 SPO

CN/CNO 3

CE/CEO -3 240 3 3 240 3 K-2146 K-2147

-4 120/208

3 4 208 3, 4

-5 480 3 3 480 3 K-2158 K-2157

-7 277/480

3 4 480 3, 4

-9 240/416

3 4 416 3, 4 SPO

SN/SNO-1,2

SN/SNO-3,4

ATS Normal Position Coil

Cutout Switch DPDT

23P-1533

23P-1535

SE/SEO-1,2

SE/SEO-3,4

ATS Emergency Position Coil

Cutout Switch DPDT

23P-1534

23P-1536

A3 ATS Emergency Position Switch L-5021

A4 ATS Normal Position Switch

AA

AT

ACU/ACD

AI

AE

Limit Switch, DPDT Roller Actuator

ATS Auto Location Switch

ATS Test Location Switch

Crank Limit Switches

ATS Isolate Location

Engine Start Transfer

L-3052

L-3054, L-3052

L-3054

L-3052

L-3052

AB3

AB4

ASE

ASN

Limit Switch, DPDT Lever Actuator

Bypass Emergency Position Switch

Bypass Normal Position Switch

BSS Emergency Position Switch

BSS Normal Position Switch

L-5021

DS ATS Solenoid Disconnect Switch

Operator 2-Position Maintain L-4009

Contact Block N.C. (3) L-1020

Contact Block N.O. (2) L-1024

CBE

CBN

Emergency Interlock Solenoid

Normal Interlock Solenoid

K-2192

CBC Crank Mechanism Solenoid K-2159

RN/RNO

RE/REO

Coil Rectifiers 23P-1473



Power Panel Replacement Parts List 1600-4000 AmpsTag Description 1600/2000A 3000A 4000A

NL1,2,3

EL1,2,3

Cable Connection at Rear S-1302F(2)

Optional T1,2,3

(8) 600MCM-2

Stationary Contact Assembly Bypass and ATS S-2308 S-2343 23P-1655

Arc Grid Assembly Kit 23P-1171

Movable Contact Assembly 23P-1400 23P-1344 23P-1640

Movable Contact 23P-1399 23P-1338 SPO

Voltage Part No.

120/240 K-3061


XBN, XBE Transformer 25VA, 220/440 K-3064

Secondary 24V 240/480 K-3062

380 K-3067

575 K-3065

600 K-3066

Main ATS Operating CoilsVoltage Systems

No. Volts Ph Wire Coil Volts Poles Part No.

-1 120 1 2 120 2 SPO

-2 120/240 1 3 240 2, 3

-3 240 3 3 240 3

-4 120/208 3 4 208 3, 4

K-2151 K-2219

CN/O & CE/O -5 480 3 3 480 3 K-2160 K-2218

-6 575 3 3 600 3 SPO

-7 277/480 3 4 480 3, 4 K-2160 K-2218

-8 120/240 2 4 240 4 K-2151 K-2219

-9 240/416 3 4 416 3, 4 Consult Zenith Factory K-2220

SN/SNO Limit Switch 23P-1540

SE/SEO Limit Switch 23P-1541

A3 ATS Emergency Position Switch 23P-1543

A4 ATS Normal Position Switch 23P-1542

AAAT

AI

ATS Auto Location SwitchATS Test Location Switch

ATS Isolate Location Switch

L-3071

AE

Limit Switch DPDT, Roller Actuator

Engine Start Transfer L-3052

AB3

AB4

Limit Switch DPDT, Lever ActuatorBypass Emergency Position Switch

Bypass Normal Position Switch

L-5021

DS ATS Solenoid Disconnect Switch:Operator 2-Position Maintain

L-4018

Contact Block N.C. (1)

Contact Block N.O. (2)

L-1020

L-1024

CBE

CBN

Emergency Interlock Solenoid

Normal Interlock Solenoid

K-2192

CBC Crank Enable Solenoid K-2159R

CH Crank Handle Limit Switch L-3052

RN/RNO

RE/REO

Coil Rectifiers 23P-1473

23P-1582 (480VAC)

28 Zenith Controls, Inc.ZBTSCTH Operation and Maintenance Manual (46R-7000)


5. CONTROL PANEL LAYOUT AND PARTS LIST



Closed Transition Transfer Switch Control Panel Parts List

Tag Description Voltage Part No.

CR2 Normal Control Relay 120 VAC K-1204

DT Transfer Delay Timer Neutral to Normal 120 VAC K-1230

DTR Normal Transfer Latch Relay 120 VAC K-1204

DW Transfer Delay Timer Neutral to Emergency 120 VAC K-1230

DWR Emergency Transfer Latch Relay 120 VAC K-1204

EFOAR Relay, Emergency Fail to Open Alarm 24 VDC K-1242

EFOR Emergency Fail to Open Latching Relay 120 VDC K-1240

ETT Emergency Trip Timer 120 VAC K-1230

LTCS Latch Test Cycle Start 120 VAC K-1204

NFOAR Relay, Normal Fail to Open Alarm 24 VDC K-1242

NFOR Normal Fail to Open Latching Relay 120 VDC K-1240

OLC Open Last Close 120 VAC K-1230

PAR Power Available Relay 120 VAC K-1204

PART Power Available Timer 120 VAC K-1249

PT1,2,3,4 Potential Transformers 120 /480 VAC K-3094

120/240 VAC K-3095

120/208 VAC K-3096

RAI Normal Available Relay 120 VAC K-1204

RAE Emergency Available Relay 120 VAC K-1204

RTCS Relay Test Cycle Start 240 VAC K-1256

SCL Sync Check Latch Relay 120 VAC K-1204

ST Sync Timer 120 VAC K-1230

STR Shunt Trip Relay 120 VDC K-1240

XNE Normal/Emergency Control Transformers 24/120 VAC K-3061

SSRCP Control Panel Standard Items Parts List


XN, XE Control Transformer 208 VAC K-3070

240/480 VAC K-3071

B1,2,3 Solid State Phase Relay 208/240 VAC K-1186

480 VAC K-1188

VFSM Voltage Frequency Sensor 120 VAC K-1192

CR Control Relay 120 VAC K-1204

RT Bypass T Relay 120 VAC K-1204

J1-J11 Jumpers - PS-5067

T Time Delay to Normal, Timer Solid State 120 VAC (Adjustable .1second to 9990 hours)

K-1230

U Engine Cool Down, Timer Solid State 120 VAC (Adjustable .1second to 9990 hours)

K-1230

W Time Delay to Emergency, Timer Solid State 120 VAC (Adjustable .1second to 9990 hours)

K-1230

P1 Time Delay Engine Start, Timer 120 VAC (Adjustable.5 to 6 seconds)

K-1201



Closed Transition Transfer Switch Control Panel (Standard Items)


25 Sync Check Relay 120 VAC K-1234

47N Phase Sequencing, Normal 120 VAC K-1246

47E Phase Sequencing, Emergency 120 VAC K-1246

27/59E Over/Undervoltage, Emergency 120 VAC K-1269

27/59N Over/Undervoltage, Normal 120 VAC K-1269

AS Alarm Silence Relays 24 VDC K-1242

CCN Power Relay for CN Solenoid 120 VAC K-1120 400-1200A

K-1257 1600-3000A

CCNO Power Relay for CNO Solenoid 120 VAC K-1120

CCE Power Relay for CE Solenoid 120 VAC K-1120 400-1200A

K-1257 1600-3000A

CCEO Power Relay for CEO Solenoid 120 VAC K-1120

Bypass Control Panel Parts List

Tag Description Part No.

BR-1,2,3 Bridge Rectifier PS-5076

RNH Normal Voltage Relay K-1218

R1 Resistor, RNH, 30 ohm PS-4056

R2 Resistor, LDS, 120 ohm PS-4057

D1 Diode PS-4812

C Capacitor RNH PS-4058

ATR Auxiliary Test Relay K-1218



6. CABINET DOOR PILOT DEVICES

BYPASS-ISOLATION CLOSED TRANSITIONTRANSFER SWITCH CONTROLS



Controls and Indicating Lights Parts List

Controls Part No.

Description Operator Switch Mounting Base

Transition Mode Selector L-3081 L-1028 (4)

L-1029 (2)

Test Switch L-3081 L-1029

Failed to Open Lock Out Reset L-4020 L-1028 PS-3473

Shunt Trip Reset L-4020 L-1028

Alarm Silence Push Button (ASPB) L-1025 L-1028

L-1029

Alarm Y780001

Indicating Lights (Upper Door) Part No.

Description Color Socket Bulb Lens

Normal Available Green PS-5048

Emergency Available Red PS-5047

Bypass Normal Location Green PS-5048

Bypass Emergency Location Red PS-5046 Y500005 PS-5047

ATS Test Position Amber PS-5049

ATS Isolate Position Amber PS-5049

ATS Inhibit Red PS-5047

ATS Disconnect Switch “Off” Red PS-5047

Indicating Lights (Lower Door) Part Numbers

Description Color Socket Bulb Lens

Normal Available Green PS-5048

Emergency Available Red PS-5046 PS-5105 PS-5047

Normal Closed Green PS-5048

Emergency Closed Red PS-5054 PS-5047

Sync Light White Y500005 PS-5051

Fail To Sync Light Red PS-5105

Normal Failed To Open Red PS-5046 Y500005

Emergency Failed To Open Red Y500005 PS-5047

Shunt Trip Light Red PS-1272

Alarm Silence (ASL) Red Y500005

830 West 40th StreetChicago, IL 60609 USA

Phone: 773 247-6400Fax: 773 247-7805

E-Mail: [email protected]

© 1997 Zenith Controls, Inc.

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